Air quality index [µg/m3]:
excellent ≤ 20
good ≤ 60
lightly polluted ≤ 100
moderately polluted ≤ 140
heavily polluted ≤ 200
severely polluted > 200
PM 2.5
[µg/m3]
PM 10
HOUR OPOLSKA ST. ROOF (BEFORE FILTERS)  AIR SUPPLIED TO OFFICES
220051goodexcellent61excellent
210032goodexcellent41excellent
200029goodexcellent51excellent
190030goodexcellent41excellent
180025goodexcellent31excellent
170018excellentexcellent21excellent
160017excellentexcellent21excellent
150013excellentexcellent21excellent
140014excellentexcellent21excellent
130012excellentexcellent11excellent
120015excellentexcellent21excellent
110015excellentexcellent21excellent
100015excellentexcellent21excellent
090016excellentexcellent21excellent
080021goodexcellent21excellent
070026goodexcellent31excellent
060033goodexcellent41excellent
050029goodexcellent31excellent
040028goodexcellent41excellent
030028goodexcellent51excellent
020037goodexcellent41excellent
010036goodexcellent41excellent
000029goodexcellent31excellent
230027goodexcellent31excellent